Exit Ticket: Parallel and Perpendicular Lines

Front

What does 'b' represent in the equation y=mx+b?

Back

y-intercept

Front

What does 'm' represent in the equation y=mx+b?

Back

slope

Front

What is the slope of parallel lines?

Back

The same.

Front

What is the slope of perpendicular lines?

Back

Opposite reciprocals.

Front

What slope is perpendicular to m = 5/8?

Back

-8/5

Front

If two lines have the same slope, what can we say about them?

Back

They are parallel.

Front

If the slopes of two lines are opposite reciprocals, what can we say about them?

Back

They are perpendicular.

Front

What is the slope of a horizontal line?

Back

0

Front

What is the slope of a vertical line?

Back

Undefined.

Front

How do you find the slope between two points (x1, y1) and (x2, y2)?

Back

(y2 - y1) / (x2 - x1)